常用jstl

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<c:forEach var="boundItem" items="${boundItems}">
    ${boundItem}
</c:forEach>

<c:if test=""></c:if>

<c:choose>

   <c:when test="">    如果
   </c:when>
   
   <c:otherwise>  否则
   </c:otherwise>
  
</c:choose>
<c:url value="/css/"/>
<!--'/'是对于webroot -->

<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>

${fn:substring(string, start, end)}
${fn:contains(singlenews.keyword,'ifcontain')}